gcc/debug.h

   1 /* Debug hooks for GCC.
   2    Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2010, 2011
   3    Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify it
   6    under the terms of the GNU General Public License as published by the
   7    Free Software Foundation; either version 3, or (at your option) any
   8    later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; see the file COPYING3.  If not see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef GCC_DEBUG_H
  20 #define GCC_DEBUG_H
  21
  22 /* This structure contains hooks for the debug information output
  23    functions, accessed through the global instance debug_hooks set in
  24    toplev.c according to command line options.  */
  25 struct gcc_debug_hooks
  26 {
  27   /* Initialize debug output.  MAIN_FILENAME is the name of the main
  28      input file.  */
  29   void (* init) (const char *main_filename);
  30
  31   /* Output debug symbols.  */
  32   void (* finish) (const char *main_filename);
  33
  34   /* Called from cgraph_optimize before starting to assemble
  35      functions/variables/toplevel asms.  */
  36   void (* assembly_start) (void);
  37
  38   /* Macro defined on line LINE with name and expansion TEXT.  */
  39   void (* define) (unsigned int line, const char *text);
  40
  41   /* MACRO undefined on line LINE.  */
  42   void (* undef) (unsigned int line, const char *macro);
  43
  44   /* Record the beginning of a new source file FILE from LINE number
  45      in the previous one.  */
  46   void (* start_source_file) (unsigned int line, const char *file);
  47
  48   /* Record the resumption of a source file.  LINE is the line number
  49      in the source file we are returning to.  */
  50   void (* end_source_file) (unsigned int line);
  51
  52   /* Record the beginning of block N, counting from 1 and not
  53      including the function-scope block, at LINE.  */
  54   void (* begin_block) (unsigned int line, unsigned int n);
  55
  56   /* Record the end of a block.  Arguments as for begin_block.  */
  57   void (* end_block) (unsigned int line, unsigned int n);
  58
  59   /* Returns nonzero if it is appropriate not to emit any debugging
  60      information for BLOCK, because it doesn't contain any
  61      instructions.  This may not be the case for blocks containing
  62      nested functions, since we may actually call such a function even
  63      though the BLOCK information is messed up.  Defaults to true.  */
  64   bool (* ignore_block) (const_tree);
  65
  66   /* Record a source file location at (FILE, LINE, DISCRIMINATOR).  */
  67   void (* source_line) (unsigned int line, const char *file,
  68                         int discriminator, bool is_stmt);
  69
  70   /* Called at start of prologue code.  LINE is the first line in the
  71      function.  */
  72   void (* begin_prologue) (unsigned int line, const char *file);
  73
  74   /* Called at end of prologue code.  LINE is the first line in the
  75      function.  */
  76   void (* end_prologue) (unsigned int line, const char *file);
  77
  78   /* Called at beginning of epilogue code.  */
  79   void (* begin_epilogue) (unsigned int line, const char *file);
  80
  81   /* Record end of epilogue code.  */
  82   void (* end_epilogue) (unsigned int line, const char *file);
  83
  84   /* Called at start of function DECL, before it is declared.  */
  85   void (* begin_function) (tree decl);
  86
  87   /* Record end of function.  LINE is highest line number in function.  */
  88   void (* end_function) (unsigned int line);
  89
  90   /* Debug information for a function DECL.  This might include the
  91      function name (a symbol), its parameters, and the block that
  92      makes up the function's body, and the local variables of the
  93      function.  */
  94   void (* function_decl) (tree decl);
  95
  96   /* Debug information for a global DECL.  Called from toplev.c after
  97      compilation proper has finished.  */
  98   void (* global_decl) (tree decl);
  99
 100   /* Debug information for a type DECL.  Called from toplev.c after
 101      compilation proper, also from various language front ends to
 102      record built-in types.  The second argument is properly a
 103      boolean, which indicates whether or not the type is a "local"
 104      type as determined by the language.  (It's not a boolean for
 105      legacy reasons.)  */
 106   void (* type_decl) (tree decl, int local);
 107
 108   /* Debug information for imported modules and declarations.  */
 109   void (* imported_module_or_decl) (tree decl, tree name,
 110                                     tree context, bool child);
 111
 112   /* DECL is an inline function, whose body is present, but which is
 113      not being output at this point.  */
 114   void (* deferred_inline_function) (tree decl);
 115
 116   /* DECL is an inline function which is about to be emitted out of
 117      line.  The hook is useful to, e.g., emit abstract debug info for
 118      the inline before it gets mangled by optimization.  */
 119   void (* outlining_inline_function) (tree decl);
 120
 121   /* Called from final_scan_insn for any CODE_LABEL insn whose
 122      LABEL_NAME is non-null.  */
 123   void (* label) (rtx);
 124
 125   /* Called after the start and before the end of writing a PCH file.
 126      The parameter is 0 if after the start, 1 if before the end.  */
 127   void (* handle_pch) (unsigned int);
 128
 129   /* Called from final_scan_insn for any NOTE_INSN_VAR_LOCATION note.  */
 130   void (* var_location) (rtx);
 131
 132   /* Called from final_scan_insn if there is a switch between hot and cold
 133      text sections.  */
 134   void (* switch_text_section) (void);
 135
 136   /* Called from grokdeclarator.  Replaces the anonymous name with the
 137      type name.  */
 138   void (* set_name) (tree, tree);
 139
 140   /* This is 1 if the debug writer wants to see start and end commands for the
 141      main source files, and 0 otherwise.  */
 142   int start_end_main_source_file;
 143
 144   /* The type of symtab field used by these debug hooks.  This is one
 145      of the TYPE_SYMTAB_IS_xxx values defined in tree.h.  */
 146   int tree_type_symtab_field;
 147 };
 148
 149 extern const struct gcc_debug_hooks *debug_hooks;
 150
 151 /* The do-nothing hooks.  */
 152 extern void debug_nothing_void (void);
 153 extern void debug_nothing_charstar (const char *);
 154 extern void debug_nothing_int_charstar (unsigned int, const char *);
 155 extern void debug_nothing_int_charstar_int_bool (unsigned int, const char *,
 156                                                  int, bool);
 157 extern void debug_nothing_int (unsigned int);
 158 extern void debug_nothing_int_int (unsigned int, unsigned int);
 159 extern void debug_nothing_tree (tree);
 160 extern void debug_nothing_tree_tree (tree, tree);
 161 extern void debug_nothing_tree_int (tree, int);
 162 extern void debug_nothing_tree_tree_tree_bool (tree, tree, tree, bool);
 163 extern bool debug_true_const_tree (const_tree);
 164 extern void debug_nothing_rtx (rtx);
 165 extern void debug_nothing_rtx_rtx (rtx, rtx);
 166
 167 /* Hooks for various debug formats.  */
 168 extern const struct gcc_debug_hooks do_nothing_debug_hooks;
 169 extern const struct gcc_debug_hooks dbx_debug_hooks;
 170 extern const struct gcc_debug_hooks sdb_debug_hooks;
 171 extern const struct gcc_debug_hooks xcoff_debug_hooks;
 172 extern const struct gcc_debug_hooks dwarf2_debug_hooks;
 173 extern const struct gcc_debug_hooks vmsdbg_debug_hooks;
 174
 175 /* Dwarf2 frame information.  */
 176
 177 extern void dwarf2out_begin_prologue (unsigned int, const char *);
 178 extern void dwarf2out_vms_end_prologue (unsigned int, const char *);
 179 extern void dwarf2out_vms_begin_epilogue (unsigned int, const char *);
 180 extern void dwarf2out_end_epilogue (unsigned int, const char *);
 181 extern void dwarf2out_frame_finish (void);
 182 /* Decide whether we want to emit frame unwind information for the current
 183    translation unit.  */
 184 extern bool dwarf2out_do_frame (void);
 185 extern bool dwarf2out_do_cfi_asm (void);
 186 extern void dwarf2out_switch_text_section (void);
 187
 188 const char *remap_debug_filename (const char *);
 189 void add_debug_prefix_map (const char *);
 190
 191 /* For -fdump-go-spec.  */
 192
 193 extern const struct gcc_debug_hooks *
 194 dump_go_spec_init (const char *, const struct gcc_debug_hooks *);
 195
 196 #endif /* !GCC_DEBUG_H  */